I have a k1200s that came with the Bridgestone bt 014's and at 1700 miles the rear is shot. they have been good tires with nice turn in and grip. The front is in pretty good shape. I really would like to try a Michelin Pilot Power or the Metzler M3. But I hate to change the front as its in such nice shape. Has anyone tried mixing? :wtf Or do you think I would have any problems? I've done this on lesser HP bikes with no problems. Thanks in advance.